The moving image encoding device for encoding a plurality of moving image signals of this invention includes: a plurality of encoding sections for encoding the plurality of moving image signals, the encoding sections being provided with a plurality of quantization sub-sections for quantizing the plurality of moving image signals with predetermined quantization widths; and a quantization control section for controlling the quantization widths used by the quantization sections simultaneously.
Legal claims defining the scope of protection, as filed with the USPTO.
1. A moving image encoding and multiplexing device for encoding a plurality of moving image signals and multiplexing the encoded signals, comprising: a moving image switch section for switching a destination of a plurality of input moving images to a plurality of outputs; a plurality of encoding sections having inputs coupled to the outputs of the moving image switch section for encoding the plurality of input moving images output from the moving image switch section; a multiplexing section for multiplexing the encoded signals output from the plurality of encoding sections; and a control section for switching a switching state of the moving image switch section, an encoding mode of the encoding sections, and a multiplexing mode of the multiplexing sections; wherein the control section switches the encoding mode of the encoding sections and the multiplexing mode of the multiplexing sections depending on the switching state of the moving image switch section.
2. A moving image encoding and multiplexing device according to claim 1 , wherein the control section comprises: a switch control sub-section for switching the switching state of the moving image switch section; an encoding control sub-section for switching the encoding mode of the encoding section; and a multiplexing control sub-section for switching the multiplexing mode of the multiplexing section, and the encoding control sub-section switches the encoding mode depending on the switching state of the moving image switch section, and the multiplexing control sub-section switches the multiplexing mode depending on the switching state of the moving image switch section.
3. A moving image encoding and multiplexing device according to claim 1 , further comprising a screen division section upstream of the moving image switch section.
4. A moving image encoding and multiplexing device according to claim 1 , further comprising a moving image time-division section upstream of the moving image switch section.
5. A moving image encoding and multiplexing device according to claim 1 , further comprising accumulation sections for temporarily accumulating moving image encoded signals output from the encoding sections, wherein the encoding control sub-section determines a parameter for controlling each of the encoding sections based on a sum of bit amounts of the moving image encoded signals accumulated in the accumulation sections.
6. A moving image encoding and multiplexing device according to claim 1 , wherein the multiplexing section comprises: a moving image multiplexing sub-section for multiplexing the plurality of moving image encoded signals and outputting a moving image encoded signal; a channel multiplexing sub-section for multiplexing a plurality of input signals input into the multiplexing section and the output signal output from the moving image multiplexing sub-section; and a switch sub-section for switching the destination of the moving image encoded signals input into the multiplexing section between the moving image multiplexing sub-section and the channel multiplexing sub-section.
7. An image transmission device comprising a plurality of image encoding sections and a transmission processing section, wherein the transmission processing section multiplexes encoded data specified by the image encoding sections every multiplexing timing, transmits the encoded data to a predetermined route, and sends to the image encoding sections multiplexing information which is calculated based on encoded data amount in the image encoding sections and can be used for calculation of a delay amount taken until the encoded data is transmitted to a decoding device, and the plurality of image encoding sections determine quantization widths used at quantization in an image encoding processing based on the multiplexing information sent from the transmission processing section, encode the images, and transmit the encoded data to the transmission processing section every multiplexing timing to specify the encoded data.
8. An image transmission device according to claim 7 , wherein the transmission processing section comprises a transmission buffer, and the transmission processing section takes the encoded data specified by the image encoding sections in the transmission buffer every multiplexing timing, and outputs the encoded data at a predetermined transmission rate in the order of the taking-in of the encoded data, as well as outputting an occupation of the encoded data in the transmission buffer as multiplexing information.
9. An image transmission device according to claim 7 , wherein each of the image encoding sections includes: a quantization width determination sub-section; and a basic encoding processing sub-section for encoding images by quantizing the images with a quantization width specified by the quantization width determination sub-section, and the quantization width determination sub-section calculates a buffer occupation in each of a plurality of decoding devices which receive the encoded data transmitted from each of the image encoding sections via the transmission processing section based on the multiplexing information, and sets the quantization width based on the calculated buffer occupation in the decoding device and an amount of encoded data which has not been transmitted.
10. An image transmission device according to claim 7 , wherein each of the image encoding sections further includes an encoded data memory sub-section for temporarily storing the encoded data, and the encoded data memory sub-section temporarily stores non-transmitted data which has not been transmitted to the transmission processing section among the encoded data every transmission timing, and transmits the encoded data to the transmission processing section using as an upper limit a value preset by each of the image encoding sections or a value obtained by subtracting the buffer occupation in the decoding device calculated based on the multiplexing information from a buffer size of the decoding device predicted by the receiver side.
Cooperative Patent Classification codes for this invention. Click any code to explore related patents in that topic.
November 7, 1997
April 30, 2002
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